Hello Fizzy
If we're talking about the early Chester Champion with the round column and the offset motor with pulley drive I'd simply say 'save your money'. I bought one new and it was nothing but trouble. It was crudely made, noisy, and went through three sets of main bearings and two motors despite fairly light use. The poorly made taper gibs meant that it was impossible to avoid side play somewhere in each slide. The round column is very inconvenient in use, as mentioned by Fenley, although that of course is a matter of function rather than quality.
As a result of being sold rubbish and of delivery failings (White Van Man arrived with no handling equipment at all, not even a trolley, and had the quaint idea that it would be all right to dump the box in the road), I resolved that I'd never deal with Chester again – a decision I have not regretted.
John